Aluminum casting & mold design services

In product development and parts procurement within the manufacturing industry, aluminum casting is an essential choice due to its lightweight properties and excellent heat dissipation. However, when outsourcing aluminum casting for the first time, many managers face anxieties such as “Is it possible to get an estimate from drawings alone?” or “What are the differences between overseas and domestic procurement?” While procurement through overseas bases like Vietnam offers significant cost advantages, it is crucial to properly understand the steps of quality control and communication. Based on the expertise of Daiwa Light Alloy Vietnam (Daiwa Aluminum Vietnam), this article explains the process from the initial request for quotation to final delivery in detail. By reading this, you will clarify the specific business practices and checkpoints for each stage of aluminum casting, enabling you to acquire the know-how to avoid delivery delays or quality issues and achieve optimal cost performance even for your first order.

Aluminum casting involves a wide range of processes, from mold making to casting, machining, and surface treatment. Improving the accuracy of information in the first step is the shortcut to an accurate estimate and smooth mass production.

Before requesting an estimate, you need to prepare the following information. If these are lacking, the accuracy of the rough estimate will drop, which can cause costs to inflate later.

In recent years, due to the diversification of supply chains, procurement not only from Japan but also from Southeast Asia, particularly Vietnam, has become common. Domestic procurement is suitable for “ultra-short lead times and ultra-high precision,” while Vietnam excels in “medium-to-large scale mass production and cost reduction.”

Once you receive a quotation and place a formal order, the first stage is the design and manufacturing of the “mold.” This is a critical phase that serves as the lifeline of the product.

Key Data: Aluminum Casting Market and Procurement Trends

When reviewing the presented quotation, check if the ingot unit price, processing costs, and mold costs are listed separately. Since aluminum prices fluctuate with international markets, it is reassuring if a price adjustment rule (sliding scale system) is clearly stated.

Mold manufacturing typically takes 1.5 to 3 months. While manufacturing in Vietnam can sometimes reduce costs by 30% to 50% compared to Japan, it is essential to conduct a thorough review of design drawings and perform DFM (Design for Manufacturing) analysis on draft angles and wall thickness uniformity beforehand.

Once sample approval (T1/T2 samples) is complete, the project finally moves into mass production.

In aluminum casting, defects such as “porosity (air bubbles)” or “misruns” occur at a certain probability. To maintain a yield rate of 95% or higher, temperature management of the melting furnace (typically 650°C to 720°C) and pressure control of the casting machine (die casting machine) are key.

At Daiwa Light Alloy Vietnam, we have introduced Japanese-standard Quality Control (QC). We conduct internal defect inspections using X-ray testing and dimensional inspections using 3D measuring machines on a 100% or sampling basis to ensure that no defective products are shipped to Japan.

For overseas orders, sea freight is the main method of transport. The shipping route from Vietnam (Ho Chi Minh/Haiphong ports) to Japan (Tokyo/Osaka/Nagoya ports) takes approximately 10 to 14 days.

Although aluminum is a corrosion-resistant metal, moisture during sea transport must be avoided. The use of VCI (Volatile Corrosion Inhibitor) paper and the robustness of pallet packaging determine the quality of the product upon arrival. Regarding import duties, by utilizing the Certificate of Origin under the Japan-Vietnam EPA (Economic Partnership Agreement), many parts can be exempted or reduced to a duty rate of approximately 0.7% to 3.3%.

In your first aluminum casting order, the most important factors are “choosing a transparent partner” and “sharing detailed information.” Providing accurate data at the quotation stage, having close consultations during mold design, and maintaining strict quality control during mass production are key. By understanding this series of steps, it is possible to prevent 80% of unexpected troubles. Especially when you want to optimize the balance between cost and quality, production in Vietnam is a very powerful option. By utilizing an overseas production base based on technical guidance from Japan, you can achieve significant cost reductions while maintaining the same quality as domestic production.

If you currently feel limited by price negotiations with existing suppliers or are considering overseas procurement for a new project, we recommend starting with a small-scale prototype. Daiwa Light Alloy Vietnam will propose the optimal manufacturing method and cost based on even a single drawing and work alongside you until delivery. Please let us know your current challenges first.